process valves model selection...
TRANSCRIPT
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VXE SeriesVXK2 SeriesVX2 SeriesVDW Series
VXV3 Series
VX3 Series
VDW Series
Fluid
Air
Action
VDWVX2
VXK2VXEVX3VXDVXZVXP
VQ20/30VNAVNB
ø3.2, ø4, ø6
ø6, ø8, ø10, ø12
ø10, ø3/8", ø12
ø10, ø3/8", ø12
ø6, ø8, ø10, ø12
Series
Only low wattage, DC type
Zero pressure differential operation
For dry air
Remarks—
M5
6
1/8
Applicable port size
One-touch fittings 8
1/4
Direct operated
Pilot operated
External pilot piston
Fluid
Vacuum
Action
VDWVX2
VXK2VX3/VXV3
VNBVDWVX2VX3XL
XM/XYXVD
Series
Option: V, M
Flow rate adjustment
Lowvacuum
Mediumvacuum
Highvacuum
Remarks—
M5
6
1/8
8
1/4
Vacuum
Process Valves Model Selection 1
For product specifications such as maximum operating pressure differentials and operating temperature ranges, refer to the relevent pages of each product.
Air
Direct operated
External pilot piston
Direct operated
External pilot piston
2A
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XL Series XM/XY Series XVD Series
VXP SeriesVXZ Series VQ20/30 Series VNB SeriesVNA SeriesVXD Series
Applicable port size
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
Applicable port size
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
Vacuum KF: 16, 25, 40, 50, 63, 80, 100, 160; K63, 80, 100, 160
Vacuum KF: 16, 25, 40, 50, 63, 80; K63, 80
For VCR 1/4; For swage lock: 1/4
Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
P.453
P.27
P.81
P.257
P.377
P.113
P.171
P.311
P.513
P.559
P.567
P.453
P.27
P.81
P.377
P.567
P.453
P.27
P.377
Model Selection
BestPneumaticsNo. 10
3
VX2
VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
A
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VXD Series
VDW Series VX2 Series VXE Series
VXZ Series
VXK2 Series
Fluid
Water
Action
VDWVX2
VXK2VXEVX3VXDVXZVXPVXRVXHVNB
Series
Only low wattage, DC type
Zero pressure differential operation
Water hammer relief
Only AC type, 2 MPa or less
Remarks—
M5
6
1/8
8
1/4
Direct operated
Pilot operated
External pilot piston
Fluid
Heated water
Action
VX2VXK2VX3VXDVXZVXPVXRVNB
Series
Option: E, P
Zero pressure differential operation, Option
Option: E, P
Water hammer relief, Option: D
Remarks—
M5
6
1/8
8
1/4
Direct operated
Pilot operated
External pilot piston
Water
Heated water
ø3.2, ø4, ø6
Applicable port size
One-touch fittings
For product specifications such as maximum operating pressure differentials and operating temperature ranges, refer to the relevent pages of each product.
Process Valves Model Selection 2
4
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VXR Series VNB Series
VX3 Series VXP Series
VXH Series
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
P.453
P.27
P.81
P.257
P.377
P.113
P.171
P.311
P.323
P.333
P.567
P.27
P.81
P.377
P.113
P.171
P.311
P.323
P.567
50
2
Page
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
Applicable port size
Applicable port size
Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
Model Selection
5
VX2
VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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VX2 Series VXE Series
VXB Series VXP Series VXR Series VNA Series
VXK2 Series VXS Series
Fluid
Oil
Action
VX2VXK2VXEVX3VXHVXDVXZVXPVXRVNAVNB
Series
Only low wattage, DC type, Option: A, H
Option: A, D, H, N
Only AC type, 1.5 MPa or less
Zero pressure differential operation
Option: A, D, H, N
Water hammer relief, Option: A, D
Remarks—
M5
6
1/8
8
1/4
Direct operated
Pilot operated
External pilot piston
Steam
Fluid
Steam
Action
VX2VXK2VX3VXSVXBVXPVND
Series
Option: S, Q
Option: S
Remarks—
M5
6
1/8
8
1/4
Direct operated
External pilot piston
Pilot operated
External pilot piston
Process Valves Model Selection 3
Oil
For product specifications such as maximum operating pressure differentials and operating temperature ranges, refer to the relevent pages of each product.
6
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VX3 Series
VNB Series VND Series
VXH Series VXD Series
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
Applicable port size
Applicable port size
Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
10
3/8
15
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
P.27
P.81
P.257
P.377
P.333
P.113
P.171
P.311
P.323
P.559
P.567
P.27
P.81
P.377
P.215
P.239
P.311
P.633
Model Selection
7
VX2
VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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VXE Series VCH400 SeriesVXH Series VCH40 Series
High pressure compressed air
Fluid Action
VXEVXH
VCH40VCH400
Series
Only low wattage, DC type, 3 MPa or less
Only AC type, 2 MPa or less
Only G thread type, 5 MPa or less
Remarks
∗
—
M5
6
1/8
8
1/4
10
3/8
Direct operated
Pilot operated
Coolant
Fluid
Coolant
Action
SGCSGHVNCVNH
Series Remarks—
M5
6
1/8
8
1/4
10
3/8
External pilot piston
Chemical liquids, Pure water
Fluid Action
LVLVM
Series
Female thread type, with fittings type available
With fittings type, female thread type available
Remarks—
M5
6
1/8
8
1/4
10
3/8
Pilot operated
Direct operated
∗ Only G thread type
∗ Body ported: M5; Base mounted: M6
Dust collector
Fluid
Dust collector
Action
VXF2
Series
Dedicated for dust collector
Remarks20
3/4
25
1
40
1 1/2
50
2
Pilot operated
Process Valves Model Selection 4
For product specifications such as maximum operating pressure differentials and operating temperature ranges, refer to the relevent pages of each product.
High pressure compressed
air
Chemical liquids, Pure water
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VXF2 Series
LVM Series
SGC Series VNC Series VNH SeriesSGH Series
LV Series
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
∗
∗
20
3/4
15
1/2
∗
∗
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
20
3/4
15
1/2
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
65
2 1/2
80
3
Page
P.257
P.333
P.431
P.436
P.575
P.597
P.617
P.627
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower) Flange fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
32
1 1/4
40
1 1/2
50
2
Page
P.683
P.527
Thread type fitting (Nominal dia. A/Upper, Nominal dia. B/Lower)
Applicable port size
Applicable port size
Applicable port size
Applicable port size
80
3
15
1/2
65
2 1/2
90
3 1/2
100
4
Page
P.335
Model Selection
∗
9
VX2
VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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C, b
Indication byinternational standard
S
Cv
Cv
Conformed standard
ISO 6358: 1989JIS B 8390: 2000
JIS B 8390: 2000Equipment: JIS B 8379, 8381-1, 8381-2
IEC60534-1: 2005IEC60534-2-3: 1997JIS B 2005-1: 2012JIS B 2005-2-3: 2004Equipment: JIS B 8471, 8472, 8473
ANSI/(NFPA)T3.21.3 R1-2008
Table (1) Indication of Flow Rate Characteristics
Kv
—
—
—
—
Pneumaticequipment
Process fluidcontrol
equipment
Correspondingequipment
Otherindications
1. Indication of flow rate characteristicsThe flow rate characteristics in equipment such as a solenoid valve, etc. are indicated in their specifications as shown in Table (1).
2. Pneumatic equipment2.1 Indication according to the international standards(1) Conformed standard
ISO 6358: 1989 : Pneumatic fluid power—Components using compressible fluids—Determination of flow rate characteristics
JIS B 8390: 2000 : Pneumatic fluid power—Components using compressible fluids—How to test flow rate characteristics
(2) Definition of flow rate characteristicsThe flow rate characteristics are indicated as a result of a comparison between sonic conductance C and critical pressure ratio b.Sonic conductance C : Value which divides the passing mass flow rate of an equipment in a choked flow
condition by the product of the upstream absolute pressure and the density in a standard condition.
Critical pressure ratio b : Pressure ratio (downstream pressure/upstream pressure) which will turn to a choked flow when the value is smaller than this ratio.
Choked flow : The flow in which the upstream pressure is higher than the downstream pressure and where sonic speed in a certain part of an equipment is reached. Gaseous mass flow rate is in proportion to the upstream pressure and not dependent on the downstream pressure.
Subsonic flow : Flow greater than the critical pressure ratioStandard condition : Air in a temperature state of 20°C, absolute pressure 0.1 MPa (= 100 kPa = 1 bar),
relative humidity 65%.It is stipulated by adding the “(ANR)” after the unit depicting air volume.(standard reference atmosphere)Conformed standard: ISO 8778: 1990 Pneumatic fluid power—Standard referenceatmosphere, JIS B 8393: 2000: Pneumatic fluid power—Standard reference atmosphere
(3) Formula for flow rateIt is described by the practical units as following.WhenP2 + 0.1———— ≤ b, choked flowP1 + 0.1 293Q = 600 x C (P1 + 0.1) ———— ·····························································(1) 273 + TWhen P2 + 0.1———— > b, subsonic flowP1 + 0.1
Solenoid Valve Flow Rate Characteristics(How to indicate flow rate characteristics)
P2 + 0.1 ———— – b P1 + 0.1 Q = 600 x C (P1 + 0.1) 1 – —————— ———— ···························· (2) 1 – b
2
293273 + T
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ød2
ød1
3d3
3d210d23d110d1≥10d3
ød3≥3d1
Q : Air flow rate [L/min (ANR)]C : Sonic conductance [dm3/(s·bar)], dm3 (Cubic decimeter) of SI = L (liter).b : Critical pressure ratio [—]P1 : Upstream pressure [MPa]P2 : Downstream pressure [MPa]T : Temperature [°C]Note) Formula of subsonic flow is the elliptic analogous curve.Flow rate characteristics are shown in Graph (1) For details, please use the calculation software available from SMC website.
Example)Obtain the air flow rate for P1 = 0.4 [MPa], P2 = 0.3 [MPa], T = 20 [°C] when a solenoid valve is performed inC = 2 [dm3/(s·bar)] and b = 0.3.
293According to formula 1, the maximum flow rate = 600 x 2 x (0.4 + 0.1) x ————— = 600 [L/min (ANR)] 273 + 20
0.3 + 0.1Pressure ratio = ————— = 0.8 0.4 + 0.1Based on Graph (1), it is going to be 0.7 if it is read by the pressure ratio as 0.8 and the flow ratio to be b = 0.3.Hence, flow rate = Max. flow x flow ratio = 600 x 0.7 = 420 [L/min (ANR)]
(4) Test methodAttach a test equipment with the test circuit shown in Fig. (1) while maintaining the upstream pressure to a certain level which does not go below 0.3 MPa. Next, measure the maximum flow to be saturated in the first place, then measure this flow rate at 80%, 60%, 40%, 20% and the upstream and downstream pressure. And then, obtain the sonic conductance C from this maximum flow rate. In addition, calculate b using each data of others and the subsonic flow formula, and then obtain the critical pressure ratio b from that average.
10.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
EquipmentC , b
P2
Q
P1
b = 0.10.2
0.5
0.6
0.3
0.4
Pressure ratio (P2 + 0.1) / (P1 + 0.1)
Airsupply
Pressure controlequipment
Thermometer
Pressure gauge orpressure convertor
Differential pressure gauge ordifferential pressure converter
Flow controlvalve
Filter
Pipe for measuringtemperature
Pipe formeasuring
pressure in theupstream side
Pipe formeasuring
pressure in thedownstream side
Equipmentfor test
Shut offvalve
Flow meter
Fig. (1) Test circuit based on ISO 6358: 1989, JIS B 8390: 2000
Graph (1) Flow rate characteristics
Flo
w r
ate
ratio
Example
11
Solenoid Valve Flow Rate Characteristics
VX2
VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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Fig. (2) Test circuit based on JIS B 8390: 2000
Pressure switch
Timer (Clock)Pressure recorder
Controlcircuit
Thermometer
Air tank
Pressure controlequipment
Shut offvalve
FilterAirsupply
Rec
tifie
r tu
be in
the
dow
nstr
eam
sid
e
Rec
tifie
r tu
be in
the
upst
ream
sid
e
Powersupply
Solenoid valveEquipmentfor test
Pressure gaugeor pressureconvertor
2.2 Effective area S(1) Conformed standard
JIS B 8390: 2000: Pneumatic fluid power—Components using compressible fluids—Determination of flow rate characteristicsEquipment standards: JIS B 8373: Solenoid valve for pneumatics
JIS B 8379: Silencer for pneumaticsJIS B 8381-1: Fittings for pneumatics—Part 1: Push-in fittings for thermoplastic resin tubingJIS B 8381-2: Fittings for pneumatics—Part 2: Compression fittings for thermoplastic resin tubing
(2) Definition of flow rate characteristicsEffective area S : The cross-sectional area having an ideal throttle without friction deduced from the calcula-
tion of the pressure changes inside an air tank or without reduced flow when discharging the compressed air in a choked flow, from an equipment attached to the air tank. This is the same concept representing the “easy to run through” as sonic conductance C.
(3) Formula for flow rateWhenP2 + 0.1———— � 0.5, choked flowP1 + 0.1 293Q = 120 x S (P1 + 0.1) ———— ··································································(3) 273 + TWhen P2 + 0.1———— > 0.5, subsonic flowP1 + 0.1 293Q = 240 x S (P2 + 0.1) (P1 – P2) ———— ··············································(4) 273 + TConversion with sonic conductance C:S = 5.0 x C·······································································································(5)
Q : Air flow rate[L/min(ANR)]S : Effective area [mm2]P1 : Upstream pressure [MPa]P2 : Downstream pressure [MPa]T : Temperature [°C]Note) Formula for subsonic flow (4) is only applicable when the critical pressure ratio b is the unknown
equipment. In the formula (2) by the sonic conductance C, it is the same formula as when b = 0.5.
(4) Test methodAttach a test equipment with the test circuit shown in Fig. (2) in order to discharge air into the atmosphere until the pressure inside the air tank goes down to 0.25 MPa (0.2 MPa) from an air tank filled with the compressed air at a certain pressure level (0.5 MPa) which does not go below 0.6 MPa. At this time, measure the discharging time and the residual pressure inside the air tank which had been left until it turned to be the normal values to determine the effective area S, using the following formula. The volume of an air tank should be selected within the specified range by corresponding to the effective area of an equipment for test. In the case of JIS B 8379, the pressure values are in parentheses and the coefficient of the formula is 12.9. V Ps + 0.1 293S = 12.1 — log10 (—————) —— ·················(6) t P + 0.1 TS : Effective area [mm2]V : Air tank capacity [L]t : Discharging time [s]Ps : Pressure inside air tank
before discharging [MPa]P : Residual pressure inside air tank
after discharging [MPa]T : Temperature inside air tank
before discharging [K]
Solenoid Valve Flow Rate Characteristics
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2.3 Flow coefficient Cv factorThe United States Standard ANSI/(NFPA)T3.21.3: R1-2008R: Pneumatic fluid power—Flow rating test procedure and reporting method for fixed orifice componentsThis standard defines the Cv factor of the flow coefficient by the following formula that is based on the test conducted by the test circuit analogous to ISO 6358. QCv = ——————————— ·········································································(7) ∆P (P2 + Pa) 114.5 —————— T1
∆P : Pressure drop between the static pressure tapping ports [bar]P1 : Pressure of the upstream tapping port [bar gauge]P2 : Pressure of the downstream tapping port [bar gauge]:P2 = P1 – ∆PQ : Flow rate [L/s standard condition]Pa : Atmospheric pressure [bar absolute]T1 : Upstream absolute temperature [K] Test conditions are < P1 + Pa = 6.5 ± 0.2 bar absolute, T1 = 297 ± 5K, 0.07 bar ≤ ∆P � 0.14 bar.This is the same concept as effective area A which ISO 6358 stipulates as being applicable only when the pressure drop is smaller than the upstream pressure and the compression of air does not become a problem.
3. Process fluid control equipment(1) Conformed standard
IEC60534-1: 2005: Industrial-process control valves. Part 1: control valve terminology and general considerations
IEC60534-2-3: 1997: Industrial-process control valves. Part 2: Flow capacity, Section Three-Test procedures
JIS B 2005-1: 2012: Industrial-process control valves – Part 1: Control valve terminology and general considerationsJIS B 2005-2-3: 2004: Industrial-process control valves – Part 2: Flow capacity – Section 3: Test proceduresEquipment standards: JIS B 8471: Solenoid valve for water
JIS B 8472: Solenoid valve for steamJIS B 8473: Solenoid valve for fuel oil
(2) Definition of flow rate characteristics
Kv factor: Value of the clean water flow rate represented by m3/h that runs through the valve (equipment for test) at 5 to 40°C, when the pressure difference is 1 x 105 Pa (1 bar). It is calculated using the following formula:
1 x 105Kv = Q ———— · ——— ········································································(8) ∆P 1000Kv : Flow coefficient [m3/h]Q : Flow rate [m3/h]∆P : Pressure difference [Pa] : Density of fluid [kg/m3]
(3) Formula of flow rateIt is described by the practical units. Also, the flow rate characteristics are shown in Graph (2).In the case of liquid: ∆PQ = 53Kv ———— ···············································································(9) GQ : Flow rate [L/min]Kv : Flow coefficient [m3/h]∆P : Pressure difference [MPa]G : Relative density [water = 1]In the case of saturated aqueous vapor: Q = 232Kv ∆P(P2 + 0.1) ·······································································(10)Q : Flow rate [kg/h]Kv : Flow coefficient [m3/h]∆P : Pressure difference [MPa]P1 : Upstream pressure [MPa]: ∆P = P1 – P2
P2 : Downstream pressure [MPa]
ρ
ρ
Solenoid Valve Flow Rate Characteristics
13
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VXK
VXD
VXZ
VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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Solenoid Valve Flow Rate Characteristics
Example 1)Obtain the pressure difference when water [15 L/min] runs through the solenoid valve with a Kv = 1.5 m3/h.As the flow rate when Kv = 1 is calculated as the formula: Q0 = 15 x 1/1.5 = 10 [L/min], read off ∆P when Q0 is 10 [L/min] in Graph (2). The reading is 0.036 [MPa].
Example 2)Obtain the saturated steam flow rate when P1 = 0.8 [MPa] and ∆P = 0.008 [MPa] with a solenoid valve with a Kv = 0.05 [m3/h]. Read off Q0 when P1 is 0.8 and ∆P is 0.008 in Graph (2), the reading is 20 kg/h. Therefore, the flow rate is calculated as the formula: Q = 0.05/1 x 20 = 1 [kg/h].
Conversion of flow coefficient:Kv = 0.865 Cv ···········································································(11)
Here,Cv factor: Value of the clean water flow rate represented by US gal/min that runs through the valve at 40 to
100°F, when the pressure difference is 1 lbf/in2 (psi)Value is different from Kv and Cv factors for pneumatic purpose due to different test method.
(4) Test methodConnect the equipment for the test to the test circuit shown in Fig. (3), and run water at 5 to 40°C. Then, measure the flow rate with a pressure difference where vaporization does not occur in a turbulent flow (pressure difference of 0.035 MPa to 0.075 MPa when the inlet pressure is within 0.15 MPa to 0.6 MPa). However, as the turbulent flow is definitely caused, the pressure difference needs to be set with a large enough difference so that the Reynolds number does not fall below 1 x 105, and the inlet pressure needs to be set slightly higher to prevent vaporization of the liquid. Substitute the measurement results in formula (8) to calculate Kv.
Fig. (3) Test circuit based on IEC60534-2-3, JIS B 2005-2-3
Test range
Equipmentfor test
Thermometer
Throttle valvein the
upstream side
Throttle valve in thedownstream side
Flowmeter
Pressuretap
2d
≥ 20d ≥ 7d
6d
Pressuretap
Wat
er fl
ow r
ate
Q0
[L/m
in] (
Whe
n K
v =
1)
Sat
urat
ed s
team
flow
rat
e Q
0 [k
g/h]
(w
hen
Kv
= 1
)
Pressure differential ∆P [MPa]
Upstream pressure
P1 = 1 MPaP1 = 0.8 MPa
P1 = 0.6 MPa
P1 = 0.5 MPa
P1 = 0.1 MPa
P1 = 0.2 MPa
P1 = 0.4 MPa
Example 2
Example 1
P1 = 0.3 MPa
1
10
100
1
10
100
0.001 0.01 0.1
20
3
4
30
20
5
30
0.002 0.003 0.02 0.03 0.040.004
2
3
45
2
50
4040
50
Graph (2) Flow rate characteristics
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For Air
Dow
nstr
eam
pre
ssur
e of
val
ve (P
2) M
Pa Upstream pressure of valve P1 Approx. 1.0 MPa
1.0
0.8
0.6
0.4
0.2
0
Subsonic
Sonic
Critical
pressure
Flow rate Q L/min(ANR)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
50 100 150 200 250 300 400350
100 200 300 400 500
1,000
400 600
600
800 1,000 1,200
200 1,400
350 700
400 700 1,000 1,300
500 700
700 1,000
ø2
ø3
ø4
ø5
ø7
ø8
ø10
ø10
For Saturated Steam
Dow
nstr
eam
pre
ssur
e of
val
ve (P
2) M
Pa Upstream pressure of valve P1 Approx. 1.0 MPa
1.0
0.8
0.6
0.4
0.2
0
Subsonic
Sonic
Flow rate Q kg/h
0.1
(664) (183)
(663) (179)
(662) (174)
(661) (170)
(660) (164)
(658) (158)
(656) (151)
(654) (143)
(650) (133)
(646) (120) 0.2
0.3
0.4
0.5
0.6
0.70.8
0.9
5 10 15 2520
10 15 20 25 45403530
40
2010 30
30
40 50 60
50 60 70 80
20 30
20
40 60
30 45
35 50
How to read the graphThe sonic range pressure to generate a flow rate of 15 kg/h isP1 Approx. 0.55 MPa for ø2 orifice and P1 Approx. 0.28 MPa for ø3 orifice.The holding heat slightly differs depending on the pressure P1, but at 15 kg/h it is approximately 9700 kcal/h.
ø2
ø3
ø4
ø5
ø7
ø8
ø10 (Port size: 1/4)
ø10 (Port size: 3/8, 1/2)
Critical
pressure
Flow Rate CharacteristicsNote) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 10 through to 14.
How to read the graphThe sonic range pressure to generate a flow rate of 400 L/min (ANR) isP1 Approx. 0.2 MPa for a ø4 orifice andP1 Approx. 0.58 MPa for a ø3 orifice.
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VXK
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VXS
VXB
VXE
VXP
VXR
VXH
VXF
VX3
VXA
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Flow Rate Characteristics
For Water
Flo
w r
ate
Q L
/min
30
20
10
543
2
1
0.001 (0.0018) (0.0054) 0.01(0.013)
0.05 (0.07)0.1
Pressure differential ∆P = (P1−P2) MPa
How to read the graphWhen a water flow of 2 L/min is generated, ∆P Approx. 0.013 MPa for a valve with ø3 orifice.
ø4, ø5ø8 ø7
ø3
ø2
ø10
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